major war against the cyber u.s. nonzript neighborhood and this 12-story building, the source of thousands of cyber attacks against 141 u.s. companies, spanning 20 industries. according to a new security report confirmed by u.s. intelligence, it is the headquarters of unit 61398, cyber warriors for china's people's liberty. >> the chinese government sapgsing these attacks. >> among the targets of the hackers, america's very infrastructure. >> now our enemies are seeking the ability to sabotage our power grid, our financial institutions, our air traffic control systems. >> reporter: other targets, the news media, including "the new york times," the washington post and wall street journal. and familiar brands like coca cola, facebook. ugly gorilla and dota, according to this instructional video from the computer security firm that did the study. >> we see dota logging in. >> reporter: attackers send deceptive e-mails, tricking users to clicking on a malicious link to a phony website so the hackers can steal confidentia